Z86E09 Datasheet, PDF (36/38 Pages) Zilog, Inc. – Z8 CMOS OTP Microcontrollers

Z86E02/E04/E08/E09 SL1995
Z8 CMOS OTP Microcontrollers
31
Recommendations to Third-Party Programmers
ZiLOG recommends the top-level flow illustrated in Figure 21 for programming
user code and option bits into OTP.
Figure 21. Third-Party Top-Level Algorithm
Start
Download User Code
to Buffer
Select Option Bits
EPROM ARRAY
Fail
PROGRAM/VERIFY
User Code
Pass
EPROM READ
Fail
User Code
Pass
OPTION BIT
Fail
PROGRAM/VERIFY
Pass
Show as Pass
Show as Fail
ZiLOG recommends that third-party programmers offer the following features for
OTP operations.
• Blank check
• Examine OTP code
• Program/verify code and option bits
• Verify code
• Checksum of OTP
PS009201-0301
Programming Specification